Specifications
| Type | Description |
|---|---|
| Part Number | SN74LVC4245APWR |
| Manufacturer | Texas Instruments |
| Product Type | Operational Amplifier |
| Category | Signal Chain |
| Package / Case | DB (SSOP-24) 8.2 mm x 7.8 mm; DW (SOIC-24) 15.5 mm x 10.3 mm; PW (TSSOP-24) 7.8 mm x 6.4 mm |
| Function | 8-bit noninverting direction-controlled translating bus transceiver with 3-state outputs |
| A-Port Supply Voltage Range | 4.5 to 5.5 V |
| B-Port Supply Voltage Range | 2.7 to 3.6 V |
| A-Port Absolute Maximum Supply Voltage | -0.5 to 6.5 V |
| B-Port Absolute Maximum Supply Voltage | -0.5 to 4.6 V |
| Operating Free-Air Temperature | -40 to 85 °C |
| Storage Temperature | -65 to 150 °C |
| A-Port Input Voltage Range | 0 to VCCA V |
| B-Port Input Voltage Range | 0 to VCCB V |
| A-Port High-Level Input Voltage | 2 V min |
| A-Port Low-Level Input Voltage | 0.8 V max |
| B-Port High-Level Input Voltage | 2 V min |
| B-Port Low-Level Input Voltage | 0.8 V max |
| A-Port Output Drive Current | IOH = -24 mA, IOL = 24 mA; VCCA = 4.5 V to 5.5 V |
| B-Port Output Drive Current at 2.7 V | IOH = -12 mA, IOL = 12 mA; VCCB = 2.7 V |
| B-Port Output Drive Current at 3 V | IOH = -24 mA, IOL = 24 mA; VCCB = 3 V |
| A-Port High-Level Output Voltage | 4.3 V min at VCCA = 4.5 V; 5.3 V min at VCCA = 5.5 V; IOH = -100 µA |
| A-Port High-Level Output Voltage at Load | 3.7 V min at VCCA = 4.5 V; 4.7 V min at VCCA = 5.5 V; IOH = -24 mA |
| A-Port Low-Level Output Voltage | 0.2 V max; IOL = 100 µA, VCCA = 4.5 V or 5.5 V |
| A-Port Low-Level Output Voltage at Load | 0.55 V max; IOL = 24 mA, VCCA = 4.5 V or 5.5 V |
| B-Port High-Level Output Voltage | VCC - 0.2 V min; IOH = -100 µA, VCCB = 2.7 V to 3.6 V |
| B-Port High-Level Output Voltage at 2.7 V | 2.2 V min; IOH = -12 mA, VCCB = 2.7 V |
| B-Port High-Level Output Voltage at 3 V, 12 mA | 2.4 V min; IOH = -12 mA, VCCB = 3 V |
| B-Port High-Level Output Voltage at 3 V, 24 mA | 2 V min; IOH = -24 mA, VCCB = 3 V |
| B-Port Low-Level Output Voltage | 0.2 V max; IOL = 100 µA, VCCB = 2.7 V to 3.6 V |
| B-Port Low-Level Output Voltage at 2.7 V | 0.4 V max; IOL = 12 mA, VCCB = 2.7 V |
| B-Port Low-Level Output Voltage at 3 V | 0.55 V max; IOL = 24 mA, VCCB = 3 V |
| A-to-B Propagation Delay | tPHL 1 to 6.3 ns; tPLH 1 to 6.7 ns; VCCA = 5 V ±0.5 V, VCCB = 2.7 V to 3.6 V, CL = 50 pF |
| B-to-A Propagation Delay | tPHL 1 to 6.1 ns; tPLH 1 to 5 ns; VCCA = 5 V ±0.5 V, VCCB = 2.7 V to 3.6 V, CL = 50 pF |
| Output Enable Delay to A Port | tPZL 1 to 9 ns; tPZH 1 to 10 ns; OE to A, CL = 50 pF |
| Output Enable Delay to B Port | tPZL 1 to 10.3 ns; tPZH 1 to 9.8 ns; OE to B, CL = 50 pF |
| Output Disable Delay from A Port | tPLZ 1 to 7 ns; tPHZ 1 to 5.8 ns; OE to A, CL = 50 pF |
| Output Disable Delay from B Port | tPLZ 1 to 7.7 ns; tPHZ 1 to 7.8 ns; OE to B, CL = 50 pF |
| ESD Rating HBM | 2000 V; Human body model, ANSI/ESDA/JEDEC JS-001, all pins |
| ESD Rating CDM | 1000 V; Charged device model, JESD22-C101, all pins |
| VCC Isolation Threshold | Below 100 mV; if either VCCA or VCCB is below 100 mV or floating, I/O outputs are disabled and high impedance |
| Datasheet Status | request_only |
Product Overview
The SN74LVC4245APWR is a Texas Instruments 8-bit noninverting translating bus transceiver with direction control and 3-state outputs. Its A port is specified for a 4.5 to 5.5 V supply, while the B port is specified for 2.7 to 3.6 V operation, enabling bidirectional logic-level translation between these voltage domains.
Electrical limits include A-port and B-port input ranges from 0 V to their respective supplies, 2 V minimum high-level input thresholds, and 0.8 V maximum low-level input thresholds. Output drive is specified at ±24 mA on the A port, with B-port drive specified at ±12 mA for VCCB = 2.7 V and ±24 mA for VCCB = 3 V.
Package options listed for this device family include DB SSOP-24, DW SOIC-24, and PW TSSOP-24 outlines. The device supports bus translation, direction-controlled data transfer, and tri-state isolation, with outputs disabled to high impedance when either supply is below 100 mV or floating.
Key Features
- 8-bit noninverting translating bus transceiver function
- Direction-controlled data flow with 3-state outputs
- A-port supply range specified from 4.5 to 5.5 V
- B-port supply range specified from 2.7 to 3.6 V
- -40 to 85 °C operating free-air temperature
- A-to-B propagation delay up to 6.7 ns
- B-to-A propagation delay up to 6.1 ns
- A-port output drive specified at ±24 mA
- B-port output drive specified up to ±24 mA
- Outputs high impedance below 100 mV supply threshold
- 2000 V HBM and 1000 V CDM ESD ratings
Typical Applications
- 5 V to 3.3 V bus translation
- Direction-controlled digital bus interfaces
- 8-bit bidirectional logic translation
- Tri-state shared bus isolation
- Mixed-voltage signal-chain logic paths
- A-port to B-port data transfer
- B-port to A-port data transfer
Procurement Notes
When requesting a quote for SN74LVC4245APWR, buyers should confirm the manufacturer, package or case, required quantity, target date code, compliance documents, packing method, destination country and expected delivery schedule.
If alternatives are acceptable, buyers should share the approved vendor list, required electrical or optical limits, package constraints and qualification requirements. Any alternative part should be reviewed by the buyer's engineering team before production use.
For analog and signal-chain sourcing, supply voltage, bandwidth, accuracy, noise level, package, temperature grade, input/output configuration and qualification requirements should be verified before approval.
FAQ
What function does the SN74LVC4245APWR perform?
SN74LVC4245APWR is an 8-bit noninverting, direction-controlled translating bus transceiver with 3-state outputs. It supports controlled data transfer between an A port powered from 4.5 to 5.5 V and a B port powered from 2.7 to 3.6 V.
What supply ranges are specified for the A and B ports?
The recommended operating range is 4.5 to 5.5 V for VCCA on the A port and 2.7 to 3.6 V for VCCB on the B port. Absolute maximum supply ratings are -0.5 to 6.5 V for VCCA and -0.5 to 4.6 V for VCCB.
What happens when one supply is below 100 mV?
If either VCCA or VCCB is below 100 mV or floating, the datasheet states that the I/O outputs are disabled and placed in a high-impedance state. This behavior provides supply-isolation behavior across the I/O ports.
Which package options are listed for this device?
The package information lists DB SSOP-24 at 8.2 mm x 7.8 mm, DW SOIC-24 at 15.5 mm x 10.3 mm, and PW TSSOP-24 at 7.8 mm x 6.4 mm for this octal bus transceiver level shifter.
Technical Review & Sourcing Note
Prepared by LDeepAI Component Sourcing Team. Reviewed for RFQ, documentation and alternative sourcing use. Last updated: June 30, 2026.
This page is based on manufacturer datasheet information and LDeepAI sourcing review. Specifications should be verified against the official manufacturer datasheet before final procurement or design approval. Final electrical, optical and reliability approval should be confirmed by the buyer's engineering team.